Solutions by everydaycalculation.com
1st number: 1 6/15, 2nd number: 4 4/9
2115 - 409 is -13745.
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Related: 42/15-40/9 21/15-80/9 21/30-40/9 21/15-40/18 63/15-40/9 21/45-40/9 21/15-40/27 21/75-40/9 21/15-40/45 21/15-40/63
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